Mysql Date and Time type, mysql Date and Time Type

Mysql Date and Time type, mysql Date and Time Type

Current_time display current time now () display current date and time type YEAR 1 byte 1901 ~ 2155 zero value 0000 DATE 4 byte 1000-01-01 ~ 9999-12-31 0 value 0000: 00: 00 TIME 3 bytes-838: 59: 59 ~ 838: 59: 59 zero value 00: 00: 00 DATETIME 8 byte 1000-01-01 00:00:00 ~ 9999-12-31 23:59:59 0 value 0000-00-00 00: 00: 00 TIMESTAMP 4 byte 19700101080001 ~ 20380119111407 00000000000000 Note: When the inserted data exceeds the range, the zero value will be inserted into the database table YEAR Type Insert format 0000 or "0000" TIME Type Insert format "d hh: MM: SS "(This must be enclosed in quotation marks." D "indicates the number of days, and" D * 24 "indicates the number of hours), or digit format HHMMSS or string format "HHMMSS" (both of which have the same quotation marks). The display format is HH: MM: SS, And the separator cannot use other symbols, the minute and second ranges from 0 ~ 59, the hour range is 0 ~ 23 examples: Insert "2 23:50:50", "22:22:22", "11: 11", "2 20", "30" results: 71: 50: 50, 22: 22: 11: 11: 00,68, 00: 00: 30date Type Insert format: "YYYY-MM-DD" or "YYYYMMDD" Format String representation, and any punctuation can also be used as a separator such: '@', '*', and the display format is YYYY-MM-DD. Datetime Type Insert format: "YYYY-MM-DD HH: MM: SS" or "YYYYMMDDHHMMSS", display format: "YYYY-MM-DD HH: MM: SS ", in addition, any punctuation marks can also be used as separators in the timestamp format. The date and time insertion formats and display formats are the same as those in the datetime type. The date range is smaller than that in the datetime type. Any punctuation can also be used as a separator. Enter CURRENT_TIMESTAMP or NULL or no input to insert the current date and time to the system. Note: This type of time is displayed based on the time zone. For example, the time inserted in the GMT + 14:21:25 is 13:21:25, and the time displayed in the GMT + is.